Ultrafast Dynamics of Extraordinary Optical Transmission through Two-Slit Plasmonic Antenna

被引：2
作者：
Du, Guangqing [1 ,2 ]
Yu, Fangrui [1 ,2 ]
Lu, Yu [1 ,2 ]
Kai, Lin [1 ,2 ]
Chen, Caiyi [1 ,2 ]
Yang, Qing [3 ]
Hou, Xun [1 ,2 ]
Chen, Feng [1 ,2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Shaanxi Key Lab Photon Technol Informat, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China
来源：
NANOMATERIALS | 2023年 / 13卷 / 16期
基金：
美国国家科学基金会;
关键词：
ultrafast dynamics; extraordinary optical transmission; phase correlation; femtosecond laser; TIME;
D O I：
10.3390/nano13162284
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We have theoretically investigated the spatial-temporal dynamics of extraordinary optical transmission (EOT) through a two-slit plasmonic antenna under femtosecond laser dual-beam irradiation. The dynamic interference of the crossed femtosecond laser dual-beam with the transiently excited surface plasmon polariton waves are proposed to characterize the particular spatial-temporal evolutions of EOT. It is revealed that the dynamic EOT can be flexibly switched with tunable symmetry through the respective slit of a two-slit plasmonic antenna by manipulating the phase correlation of the crossed femtosecond laser dual-beam. This is explained as tunable interference dynamics by phase control of surface plasmon polariton waves, allowing the dynamic modulation of EOT at optimized oblique incidences of dual-beams. Furthermore, we have obtained the unobserved traits of symmetry-broken transient spectra of EOT from the respective up- and down-slit of the antenna under crossed femtosecond laser dual-beam irradiation. This study can provide fundamental insights into the ultrafast dynamics of EOT in two-slit plasmonic antennas, which can be helpful to advance a wide range of applications, such as ultrafast plasmonic switch, ultrahigh resolution imaging, the transient amplification of non-linear effects, etc.
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页数：10
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